Wow thanks for the quick reply. I'm putting together an unconventional braking system for my '07 Forester XT sport (its basically a WRX underneath). I have adapter dogbones that allows the use of Z32 4/2 pot calipers. The rear setup uses factory Z32 rotors and I saw this thread when I did a search for 2 piece rotors. I'd be interested in a 2 piece Z32 spec rears with either a single 5x114.3 pattern or better yet a dual 5x100/5x114.3 (or single 5x100) pattern.

Larger calipers from any Nissan Skyline GT-R also bolt up do the 240sx; 350Z front calipers require only enlarged holes on the spindle*.

Anyone here can confirm if Skyline rear spindle hub (all the same for R32/33/34) is the same as 240SX or 300ZX (both have 114mm caliper mounting spread); from above comment it looks like 240SX and Skyline have the same spindle

Front R32 spindle is available on eBay for purchase but we need to verify the rear spindle for R32/33/34 in order to adapting R35 (GTR) brake to R34.

It's similar to the 240sx and 300zx. The S13/S14 isn't actually EXACTLY the same as the Z32. The Z32 is made of aluminum vs. cast iron for the S13/S14. Also, the lower mount for the dampener is different between the Z32 and the S13/S14. That being said the R32/33/34 is very similar to the Z32 in that it's aluminum and has the same lower dampener mount. It is slightly different from the Z32 in that the toe rod connection is a ball joint type connection pressed into the hub, while the Z32/S13/S14 is a bushing type connection.

And since I've clarified all of that, when it comes to the brake mounting portion of the hub, they're all identical and can all interchange their braking systems.

I went to install this kit today and started on the rears. The adapter bracket doesn't clear the drum parking brake backing plate. I thought about just cut the backing plate down so that it would clear, but that would leave an opening for debris to enter the parking brake assy. A minor change to the design of the adapter would eliminate this issue. If you're interested, I can take pictures to show the clearance issue.

I went to install this kit today and started on the rears. The adapter bracket doesn't clear the drum parking brake backing plate. I thought about just cut the backing plate down so that it would clear, but that would leave an opening for debris to enter the parking brake assy. A minor change to the design of the adapter would eliminate this issue. If you're interested, I can take pictures to show the clearance issue.

I have also found multiple other fitment issues today when I tried to fit the rest of the system. I've already shown the adapter bracket issue. There was also a lot of overlap on the rear brake pad over onto the non-surfaced area of the rotor. On the front the brake lines aren't correct. There is a fitting in the middle of the line that attaches to the strut that isn't located in the correct position. Also, the bolts on the front brake adapter bracket are about 5/8" too long and stick way out past the bracket towards the rotor. I'll attach images of all of that as well.
Overlap

After I cut the backing plate so it would clear

Pad hanging over contact area on rear rotor

Bolts on front adapter bracket that are too long by 5/8"

Center connection point on front brake line in the wrong position. Stock style SS line that fits properly for comparison on the top of all the pictures.

Also included in the kit is a complete new lightweight rear bell/hat solution saving approx 6lbs over stock bell and to allow use of the hand brake with the correct diameter for the Skyline GTR models.

Compatible with both early 380mm and late 390mm setups. Minimum wheel size is 18″ but this varies from model/manufacturer.